A magnitude-5.1 earthquake shook eastern Japan on Sunday, swaying tall
buildings in the capital Tokyo, the Japanese Meteorological Agency said. There
were no immediate reports of damage or injuries and no risk of tsunamis,
national broadcaster NHK said.

The moderate quake was centered about 24 miles underground just northeast of
the capital in Ibaragi prefecture, the Meteorological Agency said.

Tokyo's metropolitan area is home to some 35 million people, or about a
quarter of Japan's population. A quake with an estimated magnitude-8.3 hit Tokyo
in 1923, killing 142,000 people. Powerful quakes in 1703, 1782, 1812 and 1855
also caused vast damage in the city.

Japan sits at the juncture of four tectonic plates ¡ª or moving slabs of the
earth's outer crust. It is one of the world's most earthquake-prone countries.

A powerful magnitude-7.6 struck the divided Himalayan territory of Kashmir on
Oct. 8, killing more than 38,000 people on the Pakistani side and more than
1,300 on the Indian side.